Benmezai, AbdelhamidMechrouk, Salima2015-12-132015-12-13201310219722https://dspace.univ-boumerdes.dz/handle/123456789/2523enBVPsFixed point index theoryHammerstein equationPositive solution to the nonlinear abstract hammerstein equation and applications to φ -Laplacian BVPsArticle